Question

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Answer 1

Answer:

Ans1) The three states of matter are solid, liquid and gas. For example, solid - ice, liquid - water, gas - steam.

Ans2) The two conditions in which the physical state of matter can be changed are as follows:

1) By changing temperature

2) By applying pressure.

Ans3) Gases can be Liquified by the process of condensation.

Ans4) The process by which a matter in solid state turns directly into vapour state without first changing into liquid state at a specific constant temperature is called sublimation. For example, Camphor, napthelene balls, dry ice (solid Carbon Dioxide) etc.

Ans5) Latent heat of fusion is the amount of heat required to change phase from solid to liquid at constant temperature.

Ans6) Latent heat of vaporization is the amount of heat required to change phase from liquid to vapour at constant temperature.

Ans7) Steam produces more severe burns.

Ans8) Don't know.

Ans9) The earlier scientists classify matter into 5 forms i.e., akash, vayu, tejas (agni), jal and prithvi.

Ans10) I am not perfect for this answer.

Rest I don't know.

Explanation:

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